metatherian /ˌmɛtəˈθɪərɪən/

→ compare eutherian, prototherian

• 1. 

  ADJ of, relating to, or belonging to the Metatheria, a subclass of mammals comprising the marsupials 后哺乳下纲的

• 2. 

  N any metatherian mammal; a marsupial 后哺乳下纲动物